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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-03-12 14:25:57 +0300 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2023-03-16 13:08:39 -0700 |
| commit | 5ef495e55f07aa117fdd8e187c9901cefc02fe0a (patch) | |
| tree | 796fe02adece943b5b149acbd00f9d327a821596 /arch/x86/include/asm/cpufeatures.h | |
| parent | b19b74bc99b1501a550f4448d04d59b946dc617a (diff) | |
| download | lwn-5ef495e55f07aa117fdd8e187c9901cefc02fe0a.tar.gz lwn-5ef495e55f07aa117fdd8e187c9901cefc02fe0a.zip | |
x86: Allow atomic MM_CONTEXT flags setting
So far there's no need in atomic setting of MM context flags in
mm_context_t::flags. The flags set early in exec and never change
after that.
LAM enabling requires atomic flag setting. The upcoming flag
MM_CONTEXT_FORCE_TAGGED_SVA can be set much later in the process
lifetime where multiple threads exist.
Convert the field to unsigned long and do MM_CONTEXT_* accesses with
__set_bit() and test_bit().
No functional changes.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Alexander Potapenko <glider@google.com>
Link: https://lore.kernel.org/all/20230312112612.31869-3-kirill.shutemov%40linux.intel.com
Diffstat (limited to 'arch/x86/include/asm/cpufeatures.h')
0 files changed, 0 insertions, 0 deletions